Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties. It is a substitutional allow; atoms of the two constituents may replace each other within the same crystal structure. In contrast, bronze is an alloy of copper and tin. Both bronze and brass may include small proportions of a range of other more

Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties. It is a substitutional allow; atoms of the two constituents may replace each other within the same crystal structure. In contrast, bronze is an alloy of copper and tin. Both bronze and brass may include small proportions of a range of other elements including arsenic, lead, phosphorous, aluminium, manginess and silicon. The distinction is largely historical.